Annotations: 5IZ2

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth B]	SCOP2B Superfamily	NTD of spidroin-like	8052369	3002108	SCOP2B (2022-06-29)
B [auth A]	SCOP2 Family	NTD of spidroin-like	8046115	4004885	SCOP2 (2022-06-29)
B [auth A]	SCOP2 Superfamily	NTD of spidroin-like	8052369	3002108	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	Spidroin_N	e5iz2B1	A: alpha arrays	X: PWI domain-like	H: N-terminal domain of egg case silk protein TuSp1 (From Topology)	T: N-terminal domain of egg case silk protein TuSp1	F: Spidroin_N	ECOD (1.6)
B [auth A]	Spidroin_N	e5iz2A1	A: alpha arrays	X: PWI domain-like	H: N-terminal domain of egg case silk protein TuSp1 (From Topology)	T: N-terminal domain of egg case silk protein TuSp1	F: Spidroin_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth B]	1.10.274.70	Mainly Alpha	Orthogonal Bundle	Enzyme I	Chain A, domain 2	CATH (4.3.0)
B [auth A]	1.10.274.70	Mainly Alpha	Orthogonal Bundle	Enzyme I	Chain A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF16763	Major ampullate spidroin 1, spider silk protein 1, N-term (Spidroin_N)	Major ampullate spidroin 1, spider silk protein 1, N-term	Spidroin is produced by a number of arachnids. Spidrions are made up of repetitive segments flanked by conserved non-repetitive domains, and this domain is the conserved non-repetitive region. Aggregation to form the rigid silk occurs due to associat ...	Spidroin is produced by a number of arachnids. Spidrions are made up of repetitive segments flanked by conserved non-repetitive domains, and this domain is the conserved non-repetitive region. Aggregation to form the rigid silk occurs due to association at the repetitive regions, and the N-terminal domain is necessary to prevent premature aggregation during storage before extrusion. This N_terminal region inhibits precocious aggregation and then accelerates and directs self-assembly as the pH is lowered along the extrusion duct [1].	Domain

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR038243	Spidroin, N-terminal domain superfamily	Homologous Superfamily
A [auth B], B [auth A]	IPR031913	Spidroin, N-terminal	Domain
C [auth Z]	IPR038243	Spidroin, N-terminal domain superfamily	Homologous Superfamily
C [auth Z]	IPR031913	Spidroin, N-terminal	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.